CFP - Docs - pWaitMs

pWaitMs

```
async (ms: number) => undefined
```

Return a promise that resolves after ms

const start = new Date()

await pWaitMs(20)

const end = new Date()
const tookMs = end - start
console.log(tookMs) // is close to 20
const start = new Date().getTime()

await pWaitMs(20)

const end = new Date().getTime()
const tookMs = end - start
console.log(tookMs) // is close to 20

Try It

const start = new Date()

await pWaitMs(20)

const end = new Date()
const tookMs = end - start
console.log(tookMs) // is close to 20
const start = new Date().getTime()

await pWaitMs(20)

const end = new Date().getTime()
const tookMs = end - start
console.log(tookMs) // is close to 20

We often need to asynchronously wait an amount of time. Below, we've had issues with our store API taking too long. Let's test it by mocking a timeout flow.

Try It

const stock = new Set(['socks', 'football', 'pillows'])
const storeApi = {
  isInStock: async item => {
    // let's time out half the time
    const durationMs = getRandomValue([10, 70])
    await pWaitMs(durationMs)
    return stock.has(item)
  },
}

const areSocksInStock = storeApi.isInStock('socks')
const timeout = async () => {
  await pWaitMs(50)
  return 'call took longer than 50ms'
}

const result = await Promise.race([timeout(), areSocksInStock])
console.log(result)
// half the time this will show 'true'
// the other half will show the timeout string
const stock = new Set(['socks', 'football', 'pillows'])
const storeApi = {
  isInStock: async (item: string) => {
    // let's time out half the time
    const durationMs = getRandomValue([10, 70])
    await pWaitMs(durationMs)
    return stock.has(item)
  },
}

const areSocksInStock = storeApi.isInStock('socks')
const timeout = async () => {
  await pWaitMs(50)
  return 'call took longer than 50ms'
}

const result = await Promise.race([timeout(), areSocksInStock])
console.log(result)
// half the time this will show 'true'
// the other half will show the timeout string

Try It

const stock = new Set([
  'socks',
  'football',
  'pillows',
])
const storeApi = {
  isInStock: async item => {
    // let's time out half the time
    const durationMs = getRandomValue([10, 70])
    await pWaitMs(durationMs)
    return stock.has(item)
  },
}

const areSocksInStock =
  storeApi.isInStock('socks')
const timeout = async () => {
  await pWaitMs(50)
  return 'call took longer than 50ms'
}

const result = await Promise.race([
  timeout(),
  areSocksInStock,
])
console.log(result)
// half the time this will show 'true'
// the other half will show the timeout string
const stock = new Set([
  'socks',
  'football',
  'pillows',
])
const storeApi = {
  isInStock: async (item: string) => {
    // let's time out half the time
    const durationMs = getRandomValue([10, 70])
    await pWaitMs(durationMs)
    return stock.has(item)
  },
}

const areSocksInStock =
  storeApi.isInStock('socks')
const timeout = async () => {
  await pWaitMs(50)
  return 'call took longer than 50ms'
}

const result = await Promise.race([
  timeout(),
  areSocksInStock,
])
console.log(result)
// half the time this will show 'true'
// the other half will show the timeout string